Formation characteristics of self-generated nitrogen oxides in a cement precalciner
ZKG INTERNATIONAL(2022)
Abstract
The study of the generation characteristics of self -generated NOx in a cement precalciner is very important for controlling NOx emissions. The characteristics of three types of self -generated nitrogen oxides in a precalciner were studied by numerical simulation, based on a precalciner with a daily output of 5000 t/d. The order of magnitude of thermal NOx generated in a precalciner environment is 10(-7)-10(-6) mg/m(3), of prompt NOx is 10(-3) mg/m(3) and of fuel NO. is 102 mg/m(3). The concentrations of the first two are much lower than fuel NOR, so the self-generated NOx in a precalciner is mainly fuel NOR. The concentration of fuel NOx reaches its highest value of 366 mg/m(3)near Z = 14.29 m and its concentration then remains between 355 and 366 mg/m(3).
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